20075538 has 64 divisors (see below), whose sum is σ = 50208768. Its totient is φ = 5218560.

The previous prime is 20075537. The next prime is 20075543. The reversal of 20075538 is 83557002.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20075537) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21681 + ... + 22587.

It is an arithmetic number, because the mean of its divisors is an integer number (784512).

Almost surely, 2^20075538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20075538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25104384).

20075538 is an abundant number, since it is smaller than the sum of its proper divisors (30133230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20075538 is a wasteful number, since it uses less digits than its factorization.

20075538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 20075538 is about 4480.5734008049. The cubic root of 20075538 is about 271.7830684554.

The spelling of 20075538 in words is "twenty million, seventy-five thousand, five hundred thirty-eight".